Masterweld MW7500, User Manual

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39
CE Regulation use and maintenance manual
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TABLE 3
ELECTRICAL
APPLIANCE
CATEGORY
GAS GROUPS
I Mines (methane)
II Non-mines
Category II is divided into:
D
A
N
G
E
R
IIA Propane
IIB Ethylene
IIC Hydrogen, acetylene
TABLE 4
TEMPERATURE
CLASS
IGNITION
TEMPERATURE
[°C]
MAX. TEMPERATURE
ACCEPTED ON THE
APPLIANCE [°C]
T1 >450 450
T2 >300<450 300
T3 >200<350 200
T4 >135<200 135
T5 >100<135 100
T6 >85<100 85
Table 5 and 6 refer to the specific protection categories of the appliances and electric
components.
TABLE 5
TYPE CATEGORY EN GROUP
GENERAL RULES 50014
IMMERSION IN OIL o 50015 M2-2
INTERNAL OVER-PRESSURE p 50016 M2-2
POWDER FILLING q 50017 M2-2
EXPLOSION-PROOF CASING d 50018 M2-2
INCREASED SAFETY e 50019 M2-2
INTRINSICALLY SAFE ia 50020 M1-1
SPARK PROTECTION “N” n 50021 3
ENCAPSULATION m 50028 M2-2
CATEGORY 1G 50284 1
CATEGORY 1M 50303 M1
APPLIANCE CATEGORY CATEGORY 1 CATEGORY 2 CATEGORY 3
Minimum protection Non-applicable IP 6X IP 5X
Table 7 refers to the minimum reference temperatures (T reference) for ignition of the dusts.
TYPE OF DUST
IGNITION TEMPERATURE
°C
MAX.TEMPERATURE OF
THE APPLIANCE °C
DUST CLOUD 2/3 x T
CL
≤ 2/3 x T
CL
LAYER< 5 mm T
5mm
- 75 °C ≤ (T
5mm
- 75 °C)
LAYER> 5 mm Depends on the thickness T
5mm
Where:
• T
CL
= Dust ignition temperature
• T
5mm
= Ignition temperature of a 5mm layer of dust
• T
Riferimento
= The lower between T
nube
and T
strato